/** Safe for double-quoted HTML attributes */
const escAttr = (str) =>
  String(str ?? "")
    .replace(/&/g, "&")
    .replace(/"/g, """)
    .replace(/</g, "&lt;");

/**
 * Head tags for prerendered Hersteller (Manufacturers) page
 */
const generateHerstellerMetaTags = (baseUrl, config, manufacturerCount = 0) => {
  const root = baseUrl.endsWith("/") ? baseUrl.slice(0, -1) : baseUrl;
  const herstellerUrl = root + "/Hersteller";
  const site = config.siteName || config.brandName;
  const desc = manufacturerCount + " Hersteller bei " + config.brandName + ": Top-Marken für Growshop-Produkte. Schnelle Lieferung, Laden Dresden.";
  const descShort = desc.length > 160 ? desc.slice(0, 157) + "..." : desc;
  const e = escAttr;
  const logoUrl =
    config.images && config.images.logo
      ? root + config.images.logo
      : root + "/assets/images/nopicture.jpg";

  return `
    <meta name="description" content="${e(descShort)}">
    <meta property="og:title" content="${e("Hersteller | " + site)}">
    <meta property="og:description" content="${e(descShort)}">
    <meta property="og:url" content="${herstellerUrl}">
    <meta property="og:type" content="website">
    <meta property="og:image" content="${e(logoUrl)}">
    <meta property="og:site_name" content="${e(site)}">
    <meta name="twitter:card" content="summary_large_image">
    <meta name="twitter:title" content="${e("Hersteller | " + site)}">
    <meta name="twitter:description" content="${e(descShort)}">
    <meta name="robots" content="index, follow">
    <link rel="canonical" href="${herstellerUrl}">
  `;
};

const generateHerstellerJsonLd = (baseUrl, config) => {
  const root = baseUrl.endsWith("/") ? baseUrl.slice(0, -1) : baseUrl;
  const herstellerUrl = root + "/Hersteller";

  const id = {
    business: root + "#business",
    website: root + "#website",
    breadcrumb: herstellerUrl + "#breadcrumb",
  };

  const logoUrl =
    config.images && config.images.logo
      ? root + config.images.logo
      : undefined;

  const businessNode = {
    "@id": id.business,
    "@type": ["GardenStore", "LocalBusiness", "Organization"],
    name: config.brandName,
    url: root,
  };

  if (logoUrl) {
    businessNode.logo = { "@type": "ImageObject", url: logoUrl };
    businessNode.image = { "@type": "ImageObject", url: logoUrl };
  }

  const websiteNode = {
    "@id": id.website,
    "@type": "WebSite",
    name: config.siteName || config.brandName,
    url: root,
    publisher: { "@id": id.business },
  };

  const breadcrumbNode = {
    "@id": id.breadcrumb,
    "@type": "BreadcrumbList",
    itemListElement: [
      {
        "@type": "ListItem",
        position: 1,
        name: "Home",
        item: root,
      },
      {
        "@type": "ListItem",
        position: 2,
        name: "Hersteller",
        item: herstellerUrl,
      },
    ],
  };

  const collectionPageNode = {
    "@id": herstellerUrl,
    "@type": "CollectionPage",
    name: "Hersteller",
    url: herstellerUrl,
    description: "Alle Hersteller und Marken für Growshop-Produkte",
    isPartOf: { "@id": id.website },
    breadcrumb: { "@id": id.breadcrumb },
  };

  const graph = [businessNode, websiteNode, breadcrumbNode, collectionPageNode];

  const herstellerGraph = {
    "@context": "https://schema.org",
    "@graph": graph,
  };

  return "<script type=\"application/ld+json\">" + JSON.stringify(herstellerGraph) + "</script>";
};

module.exports = {
  generateHerstellerMetaTags,
  generateHerstellerJsonLd,
};